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e52ca1e5 1/*
2 * Copyright (c) 1999-2003 Damien Miller. All rights reserved.
3 *
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions
6 * are met:
7 * 1. Redistributions of source code must retain the above copyright
8 * notice, this list of conditions and the following disclaimer.
9 * 2. Redistributions in binary form must reproduce the above copyright
10 * notice, this list of conditions and the following disclaimer in the
11 * documentation and/or other materials provided with the distribution.
12 *
13 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
14 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
15 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
16 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
17 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
18 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
19 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
20 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
21 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
22 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
23 */
24
76a8e733 25#ifndef _DEFINES_H
26#define _DEFINES_H
27
0b202697 28/* $Id$ */
29
41cb4569 30
ea1970a3 31/* Constants */
32
cb807f40 33#ifndef SHUT_RDWR
34enum
35{
36 SHUT_RD = 0, /* No more receptions. */
37 SHUT_WR, /* No more transmissions. */
38 SHUT_RDWR /* No more receptions or transmissions. */
39};
40# define SHUT_RD SHUT_RD
41# define SHUT_WR SHUT_WR
42# define SHUT_RDWR SHUT_RDWR
43#endif
44
18e92801 45#ifndef IPTOS_LOWDELAY
46# define IPTOS_LOWDELAY 0x10
47# define IPTOS_THROUGHPUT 0x08
48# define IPTOS_RELIABILITY 0x04
49# define IPTOS_LOWCOST 0x02
50# define IPTOS_MINCOST IPTOS_LOWCOST
51#endif /* IPTOS_LOWDELAY */
52
509b1f88 53#ifndef MAXPATHLEN
54# ifdef PATH_MAX
55# define MAXPATHLEN PATH_MAX
56# else /* PATH_MAX */
57# define MAXPATHLEN 64 /* Should be safe */
58# endif /* PATH_MAX */
59#endif /* MAXPATHLEN */
60
2b87da3b 61#ifndef STDIN_FILENO
729bfe59 62# define STDIN_FILENO 0
2b87da3b 63#endif
64#ifndef STDOUT_FILENO
729bfe59 65# define STDOUT_FILENO 1
2b87da3b 66#endif
67#ifndef STDERR_FILENO
729bfe59 68# define STDERR_FILENO 2
2b87da3b 69#endif
729bfe59 70
99286dc8 71#ifndef NGROUPS_MAX /* Disable groupaccess if NGROUP_MAX is not set */
b81c369b 72#ifdef NGROUPS
73#define NGROUPS_MAX NGROUPS
74#else
99286dc8 75#define NGROUPS_MAX 0
1fc243d1 76#endif
b81c369b 77#endif
1fc243d1 78
f1c4659d 79#ifndef O_NONBLOCK /* Non Blocking Open */
2b87da3b 80# define O_NONBLOCK 00004
f1c4659d 81#endif
82
610e8ff5 83#ifndef S_ISDIR
729bfe59 84# define S_ISDIR(mode) (((mode) & (_S_IFMT)) == (_S_IFDIR))
610e8ff5 85#endif /* S_ISDIR */
86
87#ifndef S_ISREG
729bfe59 88# define S_ISREG(mode) (((mode) & (_S_IFMT)) == (_S_IFREG))
89#endif /* S_ISREG */
90
610e8ff5 91#ifndef S_ISLNK
3743cc2f 92# define S_ISLNK(mode) (((mode) & S_IFMT) == S_IFLNK)
610e8ff5 93#endif /* S_ISLNK */
94
729bfe59 95#ifndef S_IXUSR
96# define S_IXUSR 0000100 /* execute/search permission, */
97# define S_IXGRP 0000010 /* execute/search permission, */
98# define S_IXOTH 0000001 /* execute/search permission, */
99# define _S_IWUSR 0000200 /* write permission, */
100# define S_IWUSR _S_IWUSR /* write permission, owner */
101# define S_IWGRP 0000020 /* write permission, group */
102# define S_IWOTH 0000002 /* write permission, other */
103# define S_IRUSR 0000400 /* read permission, owner */
104# define S_IRGRP 0000040 /* read permission, group */
105# define S_IROTH 0000004 /* read permission, other */
106# define S_IRWXU 0000700 /* read, write, execute */
107# define S_IRWXG 0000070 /* read, write, execute */
108# define S_IRWXO 0000007 /* read, write, execute */
109#endif /* S_IXUSR */
110
7b0737a4 111#if !defined(MAP_ANON) && defined(MAP_ANONYMOUS)
112#define MAP_ANON MAP_ANONYMOUS
113#endif
114
115#ifndef MAP_FAILED
116# define MAP_FAILED ((void *)-1)
117#endif
118
41cb4569 119/* *-*-nto-qnx doesn't define this constant in the system headers */
120#ifdef MISSING_NFDBITS
121# define NFDBITS (8 * sizeof(unsigned long))
122#endif
123
ddceb1c8 124/*
125SCO Open Server 3 has INADDR_LOOPBACK defined in rpc/rpc.h but
126including rpc/rpc.h breaks Solaris 6
127*/
128#ifndef INADDR_LOOPBACK
7f8e513b 129#define INADDR_LOOPBACK ((u_long)0x7f000001)
ddceb1c8 130#endif
131
ea1970a3 132/* Types */
133
cb807f40 134/* If sys/types.h does not supply intXX_t, supply them ourselves */
135/* (or die trying) */
14a9a859 136
30eac028 137
14a9a859 138#ifndef HAVE_U_INT
139typedef unsigned int u_int;
140#endif
141
cb807f40 142#ifndef HAVE_INTXX_T
976f7e19 143# if (SIZEOF_CHAR == 1)
144typedef char int8_t;
145# else
146# error "8 bit int type not found."
147# endif
cb807f40 148# if (SIZEOF_SHORT_INT == 2)
ea1970a3 149typedef short int int16_t;
cb807f40 150# else
ef51930f 151# ifdef _UNICOS
ddceb1c8 152# if (SIZEOF_SHORT_INT == 4)
153typedef short int16_t;
154# else
3d114925 155typedef long int16_t;
ddceb1c8 156# endif
3d114925 157# else
158# error "16 bit int type not found."
ef51930f 159# endif /* _UNICOS */
cb807f40 160# endif
161# if (SIZEOF_INT == 4)
ea1970a3 162typedef int int32_t;
cb807f40 163# else
ef51930f 164# ifdef _UNICOS
3d114925 165typedef long int32_t;
166# else
167# error "32 bit int type not found."
ef51930f 168# endif /* _UNICOS */
cb807f40 169# endif
cb807f40 170#endif
171
172/* If sys/types.h does not supply u_intXX_t, supply them ourselves */
173#ifndef HAVE_U_INTXX_T
174# ifdef HAVE_UINTXX_T
976f7e19 175typedef uint8_t u_int8_t;
ea1970a3 176typedef uint16_t u_int16_t;
177typedef uint32_t u_int32_t;
76a8e733 178# define HAVE_U_INTXX_T 1
cb807f40 179# else
976f7e19 180# if (SIZEOF_CHAR == 1)
181typedef unsigned char u_int8_t;
182# else
183# error "8 bit int type not found."
184# endif
cb807f40 185# if (SIZEOF_SHORT_INT == 2)
ea1970a3 186typedef unsigned short int u_int16_t;
cb807f40 187# else
ef51930f 188# ifdef _UNICOS
ddceb1c8 189# if (SIZEOF_SHORT_INT == 4)
190typedef unsigned short u_int16_t;
191# else
3d114925 192typedef unsigned long u_int16_t;
ddceb1c8 193# endif
3d114925 194# else
195# error "16 bit int type not found."
196# endif
cb807f40 197# endif
198# if (SIZEOF_INT == 4)
ea1970a3 199typedef unsigned int u_int32_t;
cb807f40 200# else
ef51930f 201# ifdef _UNICOS
3d114925 202typedef unsigned long u_int32_t;
203# else
204# error "32 bit int type not found."
205# endif
cb807f40 206# endif
bd590612 207# endif
224cbdcc 208#define __BIT_TYPES_DEFINED__
bd590612 209#endif
210
211/* 64-bit types */
212#ifndef HAVE_INT64_T
213# if (SIZEOF_LONG_INT == 8)
214typedef long int int64_t;
215# else
216# if (SIZEOF_LONG_LONG_INT == 8)
217typedef long long int int64_t;
bd590612 218# endif
219# endif
220#endif
221#ifndef HAVE_U_INT64_T
222# if (SIZEOF_LONG_INT == 8)
223typedef unsigned long int u_int64_t;
224# else
225# if (SIZEOF_LONG_LONG_INT == 8)
ea1970a3 226typedef unsigned long long int u_int64_t;
cb807f40 227# endif
228# endif
229#endif
230
0362750e 231#ifndef HAVE_U_CHAR
232typedef unsigned char u_char;
233# define HAVE_U_CHAR
234#endif /* HAVE_U_CHAR */
235
7d3b91a6 236#ifndef SIZE_T_MAX
237#define SIZE_T_MAX ULONG_MAX
238#endif /* SIZE_T_MAX */
239
e3a93db0 240#ifndef HAVE_SIZE_T
241typedef unsigned int size_t;
a6ddc88b 242# define HAVE_SIZE_T
e3a93db0 243#endif /* HAVE_SIZE_T */
244
c04f75f1 245#ifndef HAVE_SSIZE_T
246typedef int ssize_t;
247# define HAVE_SSIZE_T
248#endif /* HAVE_SSIZE_T */
249
f1c4659d 250#ifndef HAVE_CLOCK_T
251typedef long clock_t;
252# define HAVE_CLOCK_T
4f771a33 253#endif /* HAVE_CLOCK_T */
f1c4659d 254
1c04b088 255#ifndef HAVE_SA_FAMILY_T
256typedef int sa_family_t;
257# define HAVE_SA_FAMILY_T
258#endif /* HAVE_SA_FAMILY_T */
259
729bfe59 260#ifndef HAVE_PID_T
261typedef int pid_t;
262# define HAVE_PID_T
263#endif /* HAVE_PID_T */
264
ddceb1c8 265#ifndef HAVE_SIG_ATOMIC_T
266typedef int sig_atomic_t;
267# define HAVE_SIG_ATOMIC_T
268#endif /* HAVE_SIG_ATOMIC_T */
269
729bfe59 270#ifndef HAVE_MODE_T
271typedef int mode_t;
272# define HAVE_MODE_T
273#endif /* HAVE_MODE_T */
274
48e671d5 275#if !defined(HAVE_SS_FAMILY_IN_SS) && defined(HAVE___SS_FAMILY_IN_SS)
276# define ss_family __ss_family
277#endif /* !defined(HAVE_SS_FAMILY_IN_SS) && defined(HAVE_SA_FAMILY_IN_SS) */
278
77bb0bca 279#ifndef HAVE_SYS_UN_H
280struct sockaddr_un {
281 short sun_family; /* AF_UNIX */
282 char sun_path[108]; /* path name (gag) */
283};
284#endif /* HAVE_SYS_UN_H */
285
286#if defined(BROKEN_SYS_TERMIO_H) && !defined(_STRUCT_WINSIZE)
287#define _STRUCT_WINSIZE
288struct winsize {
289 unsigned short ws_row; /* rows, in characters */
290 unsigned short ws_col; /* columns, in character */
291 unsigned short ws_xpixel; /* horizontal size, pixels */
292 unsigned short ws_ypixel; /* vertical size, pixels */
293};
294#endif
295
41cb4569 296/* *-*-nto-qnx does not define this type in the system headers */
297#ifdef MISSING_FD_MASK
298 typedef unsigned long int fd_mask;
299#endif
300
ea1970a3 301/* Paths */
302
cb807f40 303#ifndef _PATH_BSHELL
304# define _PATH_BSHELL "/bin/sh"
305#endif
7cdb79d4 306#ifndef _PATH_CSHELL
307# define _PATH_CSHELL "/bin/csh"
308#endif
309#ifndef _PATH_SHELLS
310# define _PATH_SHELLS "/etc/shells"
311#endif
cb807f40 312
313#ifdef USER_PATH
314# ifdef _PATH_STDPATH
315# undef _PATH_STDPATH
316# endif
317# define _PATH_STDPATH USER_PATH
318#endif
319
320#ifndef _PATH_STDPATH
321# define _PATH_STDPATH "/usr/bin:/bin:/usr/sbin:/sbin"
322#endif
323
324#ifndef _PATH_DEVNULL
325# define _PATH_DEVNULL "/dev/null"
326#endif
327
c04f75f1 328#ifndef MAIL_DIRECTORY
329# define MAIL_DIRECTORY "/var/spool/mail"
330#endif
331
cb807f40 332#ifndef MAILDIR
333# define MAILDIR MAIL_DIRECTORY
334#endif
335
336#if !defined(_PATH_MAILDIR) && defined(MAILDIR)
337# define _PATH_MAILDIR MAILDIR
338#endif /* !defined(_PATH_MAILDIR) && defined(MAILDIR) */
339
2e73a022 340#ifndef _PATH_NOLOGIN
341# define _PATH_NOLOGIN "/etc/nologin"
342#endif
343
2f125ca1 344/* Define this to be the path of the xauth program. */
fef01705 345#ifdef XAUTH_PATH
346#define _PATH_XAUTH XAUTH_PATH
2f125ca1 347#endif /* XAUTH_PATH */
348
1d2a4613 349/* derived from XF4/xc/lib/dps/Xlibnet.h */
350#ifndef X_UNIX_PATH
5cbceb3f 351# ifdef __hpux
352# define X_UNIX_PATH "/var/spool/sockets/X11/%u"
353# else
354# define X_UNIX_PATH "/tmp/.X11-unix/X%u"
355# endif
1d2a4613 356#endif /* X_UNIX_PATH */
357#define _PATH_UNIX_X X_UNIX_PATH
358
bc79ed5c 359#ifndef _PATH_TTY
360# define _PATH_TTY "/dev/tty"
361#endif
362
ea1970a3 363/* Macros */
364
2e73a022 365#if defined(HAVE_LOGIN_GETCAPBOOL) && defined(HAVE_LOGIN_CAP_H)
366# define HAVE_LOGIN_CAP
367#endif
368
cb807f40 369#ifndef MAX
370# define MAX(a,b) (((a)>(b))?(a):(b))
371# define MIN(a,b) (((a)<(b))?(a):(b))
372#endif
373
0ae4fe1d 374#ifndef roundup
375# define roundup(x, y) ((((x)+((y)-1))/(y))*(y))
376#endif
377
cb807f40 378#ifndef timersub
0ae4fe1d 379#define timersub(a, b, result) \
380 do { \
381 (result)->tv_sec = (a)->tv_sec - (b)->tv_sec; \
382 (result)->tv_usec = (a)->tv_usec - (b)->tv_usec; \
383 if ((result)->tv_usec < 0) { \
384 --(result)->tv_sec; \
385 (result)->tv_usec += 1000000; \
386 } \
cb807f40 387 } while (0)
388#endif
389
c7578bb6 390#ifndef TIMEVAL_TO_TIMESPEC
391#define TIMEVAL_TO_TIMESPEC(tv, ts) { \
392 (ts)->tv_sec = (tv)->tv_sec; \
393 (ts)->tv_nsec = (tv)->tv_usec * 1000; \
394}
395#endif
396
397#ifndef TIMESPEC_TO_TIMEVAL
398#define TIMESPEC_TO_TIMEVAL(tv, ts) { \
399 (tv)->tv_sec = (ts)->tv_sec; \
400 (tv)->tv_usec = (ts)->tv_nsec / 1000; \
401}
402#endif
403
cb807f40 404#ifndef __P
405# define __P(x) x
406#endif
407
a8ed9fd9 408#if !defined(IN6_IS_ADDR_V4MAPPED)
409# define IN6_IS_ADDR_V4MAPPED(a) \
84afc958 410 ((((u_int32_t *) (a))[0] == 0) && (((u_int32_t *) (a))[1] == 0) && \
411 (((u_int32_t *) (a))[2] == htonl (0xffff)))
a8ed9fd9 412#endif /* !defined(IN6_IS_ADDR_V4MAPPED) */
413
cb807f40 414#if !defined(__GNUC__) || (__GNUC__ < 2)
976f7e19 415# define __attribute__(x)
cb807f40 416#endif /* !defined(__GNUC__) || (__GNUC__ < 2) */
417
41cb4569 418/* *-*-nto-qnx doesn't define this macro in the system headers */
419#ifdef MISSING_HOWMANY
420# define howmany(x,y) (((x)+((y)-1))/(y))
421#endif
422
2805b943 423#ifndef OSSH_ALIGNBYTES
424#define OSSH_ALIGNBYTES (sizeof(int) - 1)
cfadc43b 425#endif
426#ifndef __CMSG_ALIGN
2805b943 427#define __CMSG_ALIGN(p) (((u_int)(p) + OSSH_ALIGNBYTES) &~ OSSH_ALIGNBYTES)
cfadc43b 428#endif
429
430/* Length of the contents of a control message of length len */
431#ifndef CMSG_LEN
432#define CMSG_LEN(len) (__CMSG_ALIGN(sizeof(struct cmsghdr)) + (len))
433#endif
434
435/* Length of the space taken up by a padded control message of length len */
436#ifndef CMSG_SPACE
437#define CMSG_SPACE(len) (__CMSG_ALIGN(sizeof(struct cmsghdr)) + __CMSG_ALIGN(len))
438#endif
439
ea1970a3 440/* Function replacement / compatibility hacks */
441
520b41b2 442#if !defined(HAVE_GETADDRINFO) && (defined(HAVE_OGETADDRINFO) || defined(HAVE_NGETADDRINFO))
443# define HAVE_GETADDRINFO
444#endif
445
7b0737a4 446#ifndef HAVE_GETOPT_OPTRESET
d76aa6fb 447# undef getopt
448# undef opterr
449# undef optind
450# undef optopt
451# undef optreset
452# undef optarg
453# define getopt(ac, av, o) BSDgetopt(ac, av, o)
454# define opterr BSDopterr
455# define optind BSDoptind
456# define optopt BSDoptopt
457# define optreset BSDoptreset
458# define optarg BSDoptarg
7b0737a4 459#endif
460
ea1970a3 461/* In older versions of libpam, pam_strerror takes a single argument */
462#ifdef HAVE_OLD_PAM
463# define PAM_STRERROR(a,b) pam_strerror((b))
464#else
465# define PAM_STRERROR(a,b) pam_strerror((a),(b))
466#endif
467
adeebd37 468#ifdef PAM_SUN_CODEBASE
469# define PAM_MSG_MEMBER(msg, n, member) ((*(msg))[(n)].member)
470#else
471# define PAM_MSG_MEMBER(msg, n, member) ((msg)[(n)]->member)
472#endif
473
4c8ef3fb 474#if defined(BROKEN_GETADDRINFO) && defined(HAVE_GETADDRINFO)
475# undef HAVE_GETADDRINFO
488c06c8 476#endif
477#if defined(BROKEN_GETADDRINFO) && defined(HAVE_FREEADDRINFO)
478# undef HAVE_FREEADDRINFO
479#endif
480#if defined(BROKEN_GETADDRINFO) && defined(HAVE_GAI_STRERROR)
481# undef HAVE_GAI_STRERROR
482#endif
4c8ef3fb 483
c04f75f1 484#if !defined(HAVE_MEMMOVE) && defined(HAVE_BCOPY)
485# define memmove(s1, s2, n) bcopy((s2), (s1), (n))
486#endif /* !defined(HAVE_MEMMOVE) && defined(HAVE_BCOPY) */
487
86c9e193 488#if defined(HAVE_VHANGUP) && !defined(HAVE_DEV_PTMX)
3c62e7eb 489# define USE_VHANGUP
86c9e193 490#endif /* defined(HAVE_VHANGUP) && !defined(HAVE_DEV_PTMX) */
3c62e7eb 491
7f8f5e00 492#ifndef GETPGRP_VOID
493# define getpgrp() getpgrp(0)
494#endif
495
58389b85 496/* OPENSSL_free() is Free() in versions before OpenSSL 0.9.6 */
497#if !defined(OPENSSL_VERSION_NUMBER) || (OPENSSL_VERSION_NUMBER < 0x0090600f)
498# define OPENSSL_free(x) Free(x)
499#endif
500
d4d77d64 501#if !defined(HAVE___func__) && defined(HAVE___FUNCTION__)
502# define __func__ __FUNCTION__
503#elif !defined(HAVE___func__)
504# define __func__ ""
c921ee00 505#endif
506
2f125ca1 507/*
508 * Define this to use pipes instead of socketpairs for communicating with the
509 * client program. Socketpairs do not seem to work on all systems.
510 *
40d0f6b9 511 * configure.ac sets this for a few OS's which are known to have problems
2f125ca1 512 * but you may need to set it yourself
513 */
514/* #define USE_PIPES 1 */
515
1d7b9b20 516/**
517 ** login recorder definitions
518 **/
519
1d7b9b20 520/* FIXME: put default paths back in */
32eec038 521#ifndef UTMP_FILE
522# ifdef _PATH_UTMP
523# define UTMP_FILE _PATH_UTMP
524# else
525# ifdef CONF_UTMP_FILE
526# define UTMP_FILE CONF_UTMP_FILE
527# endif
528# endif
1d7b9b20 529#endif
32eec038 530#ifndef WTMP_FILE
531# ifdef _PATH_WTMP
532# define WTMP_FILE _PATH_WTMP
533# else
534# ifdef CONF_WTMP_FILE
535# define WTMP_FILE CONF_WTMP_FILE
536# endif
537# endif
1d7b9b20 538#endif
539/* pick up the user's location for lastlog if given */
32eec038 540#ifndef LASTLOG_FILE
541# ifdef _PATH_LASTLOG
542# define LASTLOG_FILE _PATH_LASTLOG
543# else
544# ifdef CONF_LASTLOG_FILE
545# define LASTLOG_FILE CONF_LASTLOG_FILE
546# endif
547# endif
d7c0f3d5 548#endif
1d7b9b20 549
550
551/* The login() library function in libutil is first choice */
552#if defined(HAVE_LOGIN) && !defined(DISABLE_LOGIN)
553# define USE_LOGIN
554
555#else
556/* Simply select your favourite login types. */
557/* Can't do if-else because some systems use several... <sigh> */
558# if defined(UTMPX_FILE) && !defined(DISABLE_UTMPX)
559# define USE_UTMPX
560# endif
561# if defined(UTMP_FILE) && !defined(DISABLE_UTMP)
562# define USE_UTMP
563# endif
564# if defined(WTMPX_FILE) && !defined(DISABLE_WTMPX)
565# define USE_WTMPX
566# endif
567# if defined(WTMP_FILE) && !defined(DISABLE_WTMP)
568# define USE_WTMP
569# endif
570
571#endif
572
573/* I hope that the presence of LASTLOG_FILE is enough to detect this */
574#if defined(LASTLOG_FILE) && !defined(DISABLE_LASTLOG)
575# define USE_LASTLOG
576#endif
577
1d7b9b20 578/** end of login recorder definitions */
579
a96fbb21 580#ifndef CMSG_DATA
581/* given pointer to struct cmsghdr, return pointer to data */
582#define CMSG_DATA(cmsg) \
583 ((u_char *)(cmsg) + (((u_int)(sizeof(struct cmsghdr)) \
584 (sizeof(int) - 1)) &~ (sizeof(int) - 1)))
585#endif /* CMSG_DATA */
586
587#ifndef CMSG_FIRSTHDR
588/*
589 * RFC 2292 requires to check msg_controllen, in case that the kernel returns
590 * an empty list for some reasons.
591 */
592# define CMSG_FIRSTHDR(mhdr) \
593 ((mhdr)->msg_controllen >= sizeof(struct cmsghdr) ? \
594 (struct cmsghdr *)(mhdr)->msg_control : \
595 (struct cmsghdr *)NULL)
596#endif /* CMSG_FIRSTHDR */
597
76a8e733 598#endif /* _DEFINES_H */
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